Packing maps refers to packing the custom assets into a bsp so they show up in game, while repacking maps refers to compressing them in order to reduce the overall filesize of the map (repacking doesnt pack the assets into the bsp)

In order to pack the assets into your map I would recommend a tool such as compilepal or VIDE

Packing maps refers to packing the custom assets into a bsp so they show up in game, while repacking maps refers to compressing them in order to reduce the overall filesize of the map (repacking doesnt pack the assets into the bsp)

In order to pack the assets into your map I would recommend a tool such as compilepal or VIDE

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I downloaded Compilepal. Do you repack first or compilepal first?

Never let anyone tell you that you cant create a map just because it's for a gamemode that has a limited pool. It's for the learning experience.

Pack a map, either with compilepal, VIDE, BspZip or something else. Once all the content has been packed (and tested by running it on a computer that doesn't have any of the custom content saved), then you repack it (aka compress the file)

What I always do, to avoid this sort of mishap, is save cubemaps until the map is fully detailed. If there are absolutely zero env_cubemap entities in the map, you won't get an annoying purple cubemap when you don't build them. The cubemaps will still be broken, but it will be far less noticeable without the checkerboard everywhere.